A winter storm descending on the US is expected to deliver heavy snow and ice to more than 150 million people across roughly ...

Strong winds, frigid temperatures, and snowfall moved across several states during the course of the last few days, and for ...

When the polar vortex stumbles, the weather at ground level can pivot from mild to brutal in a matter of days. A circulation that usually spins quietly above the pole can suddenly send lobes of Arctic ...

Michigan is experiencing frigid temperatures and heavy snow due to a dip in the jet stream, not the polar vortex. The polar vortex is a large-scale cyclone of cold air that typically stays far north ...